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1.        The cameras of the Voyager II spacecraft detected six small, previously unseen moons circling Uranus, which doubles to twelve the number of satellites now known as orbiting the distant planet.

(A) which doubles to twelve the number of satellites now known as orbiting

(B) doubling to twelve the number of satellites now known to orbit

(C) which doubles to twelve the number of satellites now known in orbit around

(D) doubling to twelve the number of satellites now known as orbiting

(E) which doubles to twelve the number of satellites now known that orbit

为什么选D不行？

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1.        The rising of costs of data-processing operations at many financial institutions has created a growing opportunity for independent companies to provide these services more efficiently and at lower cost.

(A) The rising of costs

(B) Rising costs

(C) The rising cost

(D) Because the rising cost

(E) Because of rising costs

为什么不能选A呢？

谢谢

谢谢LIKUI版！没想到这么快~

我茶了字典，be known as 确实是后接n的。那B选项种的 to orbit 做什么成分呢？

还有，The rising of costs如果改成The rising cost算是改变愿意吗？

请别烦，我是新人，低手，所以问题多了点尔。谢喽